<template>
    <div class="container">
        <div class="app-container">
            <el-button size="mini" type="primary" @click="showDialog = true">添加角色</el-button>
            <el-table :data="list">
                <!-- 放置列 -->
                <el-table-column prop="name" align="center" width="200" label="角色">
                    <template v-slot="{ row }">
                        <!-- 条件判断 -->
                        <el-input v-if="row.isEdit" size="mini" v-model="row.editRow.name" />
                        <span v-else>{{ row.name }}</span>
                    </template>
                </el-table-column>
                <el-table-column prop="state" align="center" width="200" label="启用">
                    <template v-slot="{ row }">
                        <el-switch v-if="row.isEdit" v-model="row.editRow.state" :active-value="1"
                            :inactive-value="0" />
                        <span v-else> {{ row.state === 1 ? "已启用" : row.state === 0 ? "未启用" : "无" }} </span>
                    </template>
                </el-table-column>
                <el-table-column prop="description" align="center" label="描述">
                    <template v-slot="{ row }">
                        <el-input v-if="row.isEdit" type="textarea" v-model="row.editRow.description" size="mini" />
                        <span v-else> {{ row.description }} </span>
                    </template>
                </el-table-column>
                <el-table-column align="center" label="操作">
                    <template v-slot="{ row }">
                        <template v-if="row.isEdit">
                            <!-- 编辑状态 -->
                            <el-button type="primary" size="mini" @click="btnEditOK(row)">确定</el-button>
                            <el-button size="mini" @click="row.isEdit = false">取消</el-button>
                        </template>
                        <template v-else>
                            <el-button size="mini" type="text">分配权限</el-button>
                            <el-button size="mini" type="text" @click="btnEditRow(row)">编辑</el-button>
                            <el-popconfirm title="这是一段内容确定删除吗？" @onConfirm="confirmDel(row.id)">
                                <el-button slot="reference" style="margin-left:10px" size="mini" type="text">删除</el-button>
                            </el-popconfirm>
                        </template>
                    </template>
                </el-table-column>
            </el-table>
            <el-dialog width="500px" title="新增角色" :visible.sync="showDialog" @close="btnCancel">
                <!-- 表单内容 -->
                <el-form label-width="120px" ref="roleForm" :model="roleForm" :rules="rules">
                    <el-form-item label="角色名称" prop="name">
                        <el-input style="width:300px" size="mini" v-model="roleForm.name" />
                    </el-form-item>
                    <el-form-item label="启用">
                        <el-switch size="mini" v-model="roleForm.state" :active-value="1" :inactive-value="0" />
                    </el-form-item>
                    <el-form-item label="角色描述" prop="description">
                        <el-input type="textarea" :rows="3" style="width:300px" size="mini"
                            v-model="roleForm.description" />
                    </el-form-item>
                    <el-form-item>
                        <el-row type="flex" justify="center">
                            <el-col :span="12">
                                <el-button type="primary" size="mini" @click="btnOK()">确定</el-button>
                                <el-button size="mini" @click="btnCancel()">取消</el-button>
                            </el-col>
                        </el-row>
                    </el-form-item>
                </el-form>
            </el-dialog>
        </div>
        <el-pagination :page-size="pageParams.pagesize" :current-page="pageParams.page" :total="pageParams.total"
            layout="prev, pager, next" @current-change="changePage" />
    </div>
</template>
<script>
import { getRoleList, addRole, updateRole, delRole } from '@/api/role'
export default {
    name: 'Role',
    data() {
        return {
            list: [],
            pageParams: {
                page: 1, // 第几页
                pagesize: 5, // 每页多少条
                total: 0
            },
            showDialog: false,
            roleForm: {
                name: '',
                description: '',
                state: 0 // 默认未1启用 关闭 0 打开1
            },
            rules: {
                name: [{ required: true, message: '角色名称不能为空', trigger: 'blur' }],
                description: [{ required: true, message: '角色描述不能为空', trigger: 'blur' }]
            }
        }
    },
    methods: {
        async getRoleList() {
            const { rows, total } = await getRoleList(this.pageParams)
            this.list = rows // 赋值数据
            this.pageParams.total = total
            this.list.forEach(item => {
                // item.isEdit = false // 添加一个属性 初始值为false
                // 数据响应式的问题  数据变化 视图更新
                // 添加的动态属性 不具备响应式特点
                // this.$set(目标对象, 属性名称, 初始值) 可以针对目标对象 添加的属性 添加响应式
                this.$set(item, 'isEdit', false)
                this.$set(item, 'editRow', {
                    name: item.name,
                    state: item.state,
                    description: item.description
                })
            })
        },
        // 切换分页时 请求新的数据
        changePage(newPage) {
            this.pageParams.page = newPage // 赋值当前页码
            this.getRoleList()
        },
        btnOK() {
            this.$refs.roleForm.validate(async isOK => {
                if (isOK) {
                    await addRole(this.roleForm)
                    this.$message.success('新增角色成功')
                    this.getRoleList()
                    this.btnCancel()
                }
            })
        },
        btnCancel() {
            this.$refs.roleForm.resetFields() // 重置表单数据
            this.showDialog = false // 关闭弹层
        },
        btnEditRow(row) {
            row.isEdit = true // 改变行的编辑状态
            // 更新缓存数据
            row.editRow.name = row.name
            row.editRow.state = row.state
            row.editRow.description = row.description
        },
        async btnEditOK(row) {
            if (row.editRow.name && row.editRow.description) {
                // 下一步操作
                await updateRole({ ...row.editRow, id: row.id })
                // 更新成功
                this.$message.success('更新角色成功')
                // 更新显示数据  退出编辑状态
                // row.name = row.editRow.name // eslint的一校验 误判
                // Object.assign(target, source)
                Object.assign(row, {
                    ...row.editRow,
                    isEdit: false // 退出编辑模式
                }) // 规避eslint的误判
            } else {
                this.$message.warning('角色和描述不能为空')
            }
        },
        async confirmDel(id) {
            await delRole(id) // 后端删除
            this.$message.success('删除角色成功')
            // 删除的如果是最后一个
            if (this.list.length === 1) this.pageParams.page--
            this.getRoleList()
        }
    },
    created() {
        this.getRoleList()
    }
}
</script>
<style></style>